Earth Sciences 1086F/G Chapter Notes - Chapter 5: Kuiper Belt, Jodrell Bank Observatory, Lagoon Nebula
4 Jan 2021
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Optical telescopes gathers up light and allows you to examine an image at a focal position. Even best optics have limited resolution because of the wave nature of light. Twinkling of stars comes from the turbulence in the air that makes up the atmosphere. Refractors: collect light by means of a glass lens (or combo of lenses) Reflectors: collect light with a curved mirror. The aperture of any telescope is determined by the diameter of the glass lens or the mirror. The actual magnification is done by a smaller lens known as an eyepiece or ocular. With larger apertures, more light can be collected and a higher magnification can be used. Worlds largest optical telescopes are the two keck telescopes mountain on mauna kea, hawaii. Keck observatory (1999) observed massive planet in front of its parent star 153 light years away confirmed stars other than the sun have planets.
